Electrical control system



Y E K R A M R ELECTRICAL CONTROL SYSTEM Filed May 14, 1943 2Sheets-Sheet 1 PW Ow PW mm w? v UI @N Ob @N @N Oh 5 O0 Iv nix .TN on Nmu l mw Q INVENTOR ROSCOE I. MARKET ATTORNEY R. l. MARKEY ELECTRICALCONTROL SYSTEM Nmr. 7', 194% Filed May 14, 1943 FIGS.

2 Sheets-Sheet 2 INVENTOR ROSCOE I. MARKET 2%;. min;

ATTORNEY Patented Nov. 7, 1944 A UNITED STATES ELECTRICAL CONTROL SYSTEMRoscoe I. Markey, East Orange, N. J., assignor to Pollak ManufacturingCompany,

Arlington,

N. J., a corporation of New Jersey Original application August 7, 1941,Serial No. 405,729. Divided and this application May .14, 1943, SerialNo. 487,053

1 Claim.

The invention relates to an electrical control system for bomb releasingshackles or racks,

The principal object of the present invention is to provide anelectrical control system whereby a bomb in an adjoining section cannotbe electrically connected in the release circuit until the bomb hasactually been released from the pre- Fig. 2 is a cross sectional viewwith parts in elevation, the solenoid core being in a position it wouldassume with a bomb in the rack;

Fig. 3 is a fragmentary detail sectional view showing the position ofthe solenoid core after the bomb has been dropped and before the currenthas been cut;

4 is a view similar to Fig; 3 showing the position of the core after thecurrent has been cut; and

Fig. 5 is a Wiring diagram.

This application is a divisional application of my cop'endingapplication Serial No, 405,729, filed August '7, 1941.

'Referring again to the drawings the framework or supporting structureof the shackle comprises two spaced plates I1ll0, resistance welded orotherwise 'secured to hinge-members l2 and I3.

The hinge members comprise yokes to which short rods [4 are resistancewelded or otherwise secured at their connecting portions. The yokes arebifurcated so as to form openings [5 to permit of entry of thesupporting members of the bomb rack or hanger, the exposed parts of therods I 4 acting as bearings therefor.

Hooks l6 and I1 are pivoted at 18 and IS in the plates l0 andhinge-members 12-13 at either end of the shackle. The hooks l6 and I! inthe locked position of the shackle as shown in Fig. 1 sufficiently closethe entrances of openings 20 to support rings or other suitable members2| which carry the bomb (not shown), thus providing a two point support'forthe bomb.

The upper portions of the hooks l6 and I! are pivoted at "22 to alongitudinall extending tie member 23. It will be apparent the hooks l6and I1 and tie member 23 are movable simultaneously, "and furthermorethat the weight of the bombas ithangs "on the hooks tends to moveReferring the tie-member toward the right in Fig, 1 and causes the hooksto move away from the openings Releasable locking means for tie memberand its hooks are provided and this means will now.

be described. The hook 16 has an extending toe 24 the free end of whichengages a notch 25 in a pawl 26 when the parts are in the lockedposition of Fig. 1. The pawl 26 is pivoted in the side plates [0 at '21and is normally urged toward its releasing position by a spring 28.

The pawl 26 has an arm 29, the underside of which in the locked positionengages a pin 30 forming part of the core of the solenoid 34 hereinafterdescribed. It is thus thought to be apparent that when the pin 30 on thecore of the solenoid is retracted the pin will move out of the path ofthe arm 29 and the weight of the bomb will instantly cause the toe 24 tobe disengaged from the notch 25 in the pawl 26 and the bomb will bedropped as hereto-fore described. The pawl 26 is provided with a fingerpiece 32 iex tending below the side plates so as to permit of easiermanipulation.

Safety means are provided operating in conjunction With the solenoidwhereby a bomb cannot be dropped should the solenoid becomeinadvertently energized such as by a short circuit or other things thatmight happen in an emergency, this safety means forming no part of "thepresent invention and will not be described.

The solenoid 3 1 which is mounted on one of the side plates I0 comprisesa casing 40 with the usual winding 41. The core 42 is forced outwardlyor to what might be termed the locked or holding position by a spring43. In this position it will, be apparent as heretofore described thatthe pin '30 on the end of the solenoid core will engage the pawl 26 andthe mechanism will be held in itslocked position.

' Simple means comprising this invention are provided whereby the bombshackle in the adjoining section of the rack cannot be electricallyconnected in the release circuit until the bomb has actually beenreleased from the preceding station.

This means comprises a fork mounted on the outer end of the solenoidcore and engaging plungers 6| on a pair of switche 62, 63. Theseswitches are diagrammatically illustrated in Fig. 3 and while they maybe of any desired quick action construction they preferably are of atype illustrated in Patent No. 1,960,020. The prongs of the fork areresilient or in other words comprise an elastic or spring element. Thisconstruction prevents excessive loads on the switches and provides anadjustment which is efiected at the time of installation. Thus, if theswitches are not accurately positioned, the prongsmay be slightly spreador'pushed toward each other depending upon conditions. The switch 62 asillustrated particularly in Fig. 5 is a single pole normally open switchor in other words the circuit is always open until the plunger BI isdepressed by one of the prongs 64 of the fork 60 which is carried by thecore of the solenoid. The plunger SI of the switch 62 is alwaysdepressedwhen the shackle is loaded, that is when a bomb is in position in theshackle. In the position of Fig. 5, the bomb has been dropped and itwill be noted the circuit to the fixed contact 65 is broken.

The switch 62 controls a pilot light circuit 66, the pilot light 61 ofsaid circuit preferably be.- ing located in the bombardiers station. Itwill be understood there is ,a pilot light at the bombardiers stationfor each bomb shackle and its respective switch 62. All of the pilotlights 6'! and the switches 62 may be suitably wired together andcontrolled by a master switch 68. From the foregoing it'is thought to beapparent when the shackle is loaded the plunger 6| will be depressed asshown in Fig. 2, the light circuit completed and the pilot light willinform the bombardier the bomb is in position to be dropped. After thebomb has been dropped the circuit will be broken as hereinafterdescribed and the absence of the light will enable the bombardier toknow there is no bomb in that particular shackle.

The switch 63is a single pole double throw switch in which the movablecontact" is al- The line 19 which connects to the contact 11 to completethe circuit either to the solenoid 3| or to the switch 63' on thesucceeding shackle leads from a switch 63" on the preceding shackle orto a battery or other source of power 80 located in the vicinity of thefirst shackle of the series. The master switch 14 is preferably locatedin the bombardiers station and taps into the circuit or line 19 betweenthe battery or source of power 80 and the first shackle in the series.On succeeding shackles the line 18 becomes in effect the line 19 toconnect the feed line to the switch. Thus *the current from the battery80 through the masterswitch I4 always flows through line 19 leading tothe switch 63 on the first shackle in the series and on through line '18to similar switches on succeeding shackles.

As the parts are shown in Figs. 4 and 5 the master switch I4 has beenclosed to energize the solenoid 3| connected to the switch 63, the bombin that respective shackle has been dropped and the matter switch 14again opened as is shown in said figures to cut the current and .allowthe solenoid spring to retract the solenoid core permitting the plungersBI to move outwardly. At

, this time the movable contact 10' on the switch ways in engagementwith one or the other of the fixed contacts H or 12. When the shackle isloaded and the plunger SI of the switch 63 is depressed by one of theprongs 64 the moveable contact 10 engages the fixed contact H and thecurrent is directed through the connection 13 to the wiring 4| of thesolenoid 3! of the bomb shackle. When this circuit is closed by a masterswitch hereinafter referred to the solenoid will operate the mechanismheretofore described to drop the bomb, the solenoid assuming. theposition of Fig. 3.

After the bomb has been dropped and the cir- Connected to the contact 12is a feed wire 18 which directs the curi rent to a fixed contact 11' ona similar switch illustrated at 63, the. same being located on thesucceeding shackle, the parts of which are designated by the samereference numerals, primed. From the foregoing it is thought to beapparent that a simple, foolproof and efficient arrangement has beendevised whereby in one position of the single pole double throw switchonly the solenoid on the particular shackle from which the bomb is to.be dropped may be energized and no current can be supplied to thesucceeding shackles until that bomb has been dropped. Thus when themaster switch 14 is closed, it energizes only one solenoid and drops onebomb. -Before another bomb can be dropped the master switch 14 must beopened, then closed, and like- 63' of the succeeding shackle is engagingthe fixed contact H. to direct the current to its solenoid through thelead 13'. When the master switch 14 is again closed the solenoid con-'nected to the switch 63' will be energized and the bomb in its shackledropped.

In Fig. 5 alternate current feed lines are illustrated in broken lines.If the illustrated shackle were to be considered the first in the seriesthe connection 19 would lead to the battery 80. If

the illustrated shackle were an intermediate one in the series the line19 would lead to a switch 63" on a preceding shackle.

It is to be understood the plungers 6| are in line and are operatedsimultaneously. As heretofore stated when the shackle is loaded theplungers 6| are depressed, the pilot light circuit is completed and thecircuit leading the current to thesolenoid is formed so that thesolenoid may be energized at the proper time by the master switch 14.been energized and its core 42 moved to operate the control and releasemechanism the prongs 64 on the fork 60 maintain contact with bothplungers Bl. After the bomb has been dropped and the current has beencut by opening the master switch 14 the solenoid spring 43 throws thecore 42 beyond the point of loaded position, thus permitting theplungers 6| to return to their normal position and break the pilot lightcircuit and direct the current to the switch 63 on the succeedingshackle. If the hooks l6, I!

have not opened, it is impossible for the solenoid core to move toqitsopposite end of travel so as to permit of the succeeding shackle beingconnected into the circuit, as the solenoid core will contact the topedge of the hook [6, thus preventing any possibility of jamming bombs inthe bomb bay. I

Changes in details of construction and arrangements of 'parts' may bemade by one skilled in the art without departing fromthe spirit of theinvention as exemplified in the appended claim.

I claim:

An electrical control system for a series of bomb releasing shackles,said control system hav: ing in combination a solenoid-plunger mechawisewith all succeeding bombs to be dropped.

After the solenoid has the releasing mechanism of the shackle and withthe switch of the shackle in such a manner that it engages the actuatingmechanism of the switch and closes a circuit through the first mentionedcontact of the switch when the bomb supporting means of the shackle isin bomb holding position, and is moved to a position out of engagementwith the actuating means of the switch subsequent to its actuation torelease the releasing mechanism of the shackle with a resulting closingof the circuit through the second mentioned contact of the switch.

ROSCOE I. MARKEY.

